Ventilation in new buildings (central vs. decentralized), noise disturbance

So far, I have not felt that controlled residential ventilation in the evening (provided the air is cooler) achieves any significant temperature change even at maximum level. Presumably, as described by Sebastian, the air exchange rates are simply too low. Opening windows and creating a draft brings a much faster and better effect.

Yes, that's why I wrote that if the system is supposed to cool the house even a little in summer, then the heat exchanger is completely ignored and the fresh air only comes through the bypass...everything else belongs in the colorful and shiny brochures of the salespeople....

My response was more related to [Bieber's statement] than to yours

Of course, there is no big cooling effect, but if you bring in air that is 8 degrees colder for 12 hours during the day with Wt, it is still a difference overall compared to when the bypass is open during the day as well

von unterwegs

We also get from 23°C to 21.5°C at night with summer mode when it is correspondingly cooler at night... however, no idea how much of that would happen without summer mode

We had over 30 °C outside on Friday and over the weekend, inside about 23/24 °C. If I now open the window, I bring more than 30 °C warm air into the house. If I ventilate via the controlled residential ventilation with heat exchanger, the fresh air is cooled there. It stays cooler inside the house for longer. Only when it gets too warm inside the house and the outside temperature falls below the target temperature of the house, the bypass is opened.

See also #35